642554339 has 8 divisors (see below), whose sum is σ = 735958368. Its totient is φ = 549552960.

The previous prime is 642554333. The next prime is 642554347. The reversal of 642554339 is 933455246.

642554339 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 642554339 - 2⁴ = 642554323 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 642554296 and 642554305.

It is not an unprimeable number, because it can be changed into a prime (642554333) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97232 + ... + 103629.

It is an arithmetic number, because the mean of its divisors is an integer number (91994796).

Almost surely, 2^642554339 is an apocalyptic number.

642554339 is a deficient number, since it is larger than the sum of its proper divisors (93404029).

642554339 is a wasteful number, since it uses less digits than its factorization.

642554339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201325.

The product of its digits is 388800, while the sum is 41.

The square root of 642554339 is about 25348.6555659270. The cubic root of 642554339 is about 862.9188450598.

The spelling of 642554339 in words is "six hundred forty-two million, five hundred fifty-four thousand, three hundred thirty-nine".